root / drupal7 / sites / all / libraries / tcpdf-6.2.9 / tcpdf_parser.php @ 6d8023f2
| 1 | 85ad3d82 | Assos Assos | <?php
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| 2 | //============================================================+
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| 3 | // File name : tcpdf_parser.php
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| 4 | c3ebc5b9 | Assos Assos | // Version : 1.0.16
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| 5 | 85ad3d82 | Assos Assos | // Begin : 2011-05-23
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| 6 | c3ebc5b9 | Assos Assos | // Last Update : 2015-04-28
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| 7 | 85ad3d82 | Assos Assos | // Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
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| 8 | // License : http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT GNU-LGPLv3
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| 9 | // -------------------------------------------------------------------
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| 10 | c3ebc5b9 | Assos Assos | // Copyright (C) 2011-2015 Nicola Asuni - Tecnick.com LTD
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| 11 | 85ad3d82 | Assos Assos | //
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| 12 | // This file is part of TCPDF software library.
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| 13 | //
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| 14 | // TCPDF is free software: you can redistribute it and/or modify it
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| 15 | // under the terms of the GNU Lesser General Public License as
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| 16 | // published by the Free Software Foundation, either version 3 of the
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| 17 | // License, or (at your option) any later version.
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| 18 | //
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| 19 | // TCPDF is distributed in the hope that it will be useful, but
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| 20 | // WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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| 22 | // See the GNU Lesser General Public License for more details.
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| 23 | //
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| 24 | // You should have received a copy of the License
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| 25 | // along with TCPDF. If not, see
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| 26 | // <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>.
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| 27 | //
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| 28 | // See LICENSE.TXT file for more information.
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| 29 | // -------------------------------------------------------------------
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| 30 | //
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| 31 | // Description : This is a PHP class for parsing PDF documents.
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| 32 | //
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| 33 | //============================================================+
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| 34 | |||
| 35 | /**
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| 36 | * @file
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| 37 | * This is a PHP class for parsing PDF documents.<br>
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| 38 | * @package com.tecnick.tcpdf
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| 39 | * @author Nicola Asuni
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| 40 | c3ebc5b9 | Assos Assos | * @version 1.0.15
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| 41 | 85ad3d82 | Assos Assos | */
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| 42 | |||
| 43 | // include class for decoding filters
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| 44 | require_once(dirname(__FILE__).'/include/tcpdf_filters.php'); |
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| 45 | |||
| 46 | /**
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| 47 | * @class TCPDF_PARSER
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| 48 | * This is a PHP class for parsing PDF documents.<br>
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| 49 | * @package com.tecnick.tcpdf
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| 50 | * @brief This is a PHP class for parsing PDF documents..
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| 51 | c3ebc5b9 | Assos Assos | * @version 1.0.15
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| 52 | 85ad3d82 | Assos Assos | * @author Nicola Asuni - info@tecnick.com
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| 53 | */
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| 54 | class TCPDF_PARSER { |
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| 55 | |||
| 56 | /**
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| 57 | * Raw content of the PDF document.
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| 58 | * @private
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| 59 | */
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| 60 | private $pdfdata = ''; |
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| 61 | |||
| 62 | /**
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| 63 | * XREF data.
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| 64 | * @protected
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| 65 | */
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| 66 | protected $xref = array(); |
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| 67 | |||
| 68 | /**
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| 69 | * Array of PDF objects.
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| 70 | * @protected
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| 71 | */
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| 72 | protected $objects = array(); |
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| 73 | |||
| 74 | /**
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| 75 | * Class object for decoding filters.
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| 76 | * @private
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| 77 | */
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| 78 | private $FilterDecoders; |
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| 79 | |||
| 80 | /**
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| 81 | * Array of configuration parameters.
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| 82 | * @private
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| 83 | */
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| 84 | private $cfg = array( |
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| 85 | 'die_for_errors' => false, |
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| 86 | 'ignore_filter_decoding_errors' => true, |
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| 87 | 'ignore_missing_filter_decoders' => true, |
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| 88 | ); |
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| 89 | |||
| 90 | // -----------------------------------------------------------------------------
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| 91 | |||
| 92 | /**
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| 93 | * Parse a PDF document an return an array of objects.
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| 94 | * @param $data (string) PDF data to parse.
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| 95 | * @param $cfg (array) Array of configuration parameters:
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| 96 | * 'die_for_errors' : if true termitate the program execution in case of error, otherwise thows an exception;
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| 97 | * 'ignore_filter_decoding_errors' : if true ignore filter decoding errors;
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| 98 | * 'ignore_missing_filter_decoders' : if true ignore missing filter decoding errors.
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| 99 | * @public
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| 100 | * @since 1.0.000 (2011-05-24)
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| 101 | */
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| 102 | public function __construct($data, $cfg=array()) { |
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| 103 | if (empty($data)) { |
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| 104 | $this->Error('Empty PDF data.'); |
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| 105 | } |
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| 106 | c3ebc5b9 | Assos Assos | // find the pdf header starting position
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| 107 | if (($trimpos = strpos($data, '%PDF-')) === FALSE) { |
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| 108 | $this->Error('Invalid PDF data: missing %PDF header.'); |
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| 109 | } |
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| 110 | 85ad3d82 | Assos Assos | // get PDF content string
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| 111 | c3ebc5b9 | Assos Assos | $this->pdfdata = substr($data, $trimpos); |
| 112 | 85ad3d82 | Assos Assos | // get length
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| 113 | $pdflen = strlen($this->pdfdata); |
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| 114 | c3ebc5b9 | Assos Assos | // set configuration parameters
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| 115 | $this->setConfig($cfg); |
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| 116 | 85ad3d82 | Assos Assos | // get xref and trailer data
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| 117 | $this->xref = $this->getXrefData(); |
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| 118 | // parse all document objects
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| 119 | $this->objects = array(); |
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| 120 | foreach ($this->xref['xref'] as $obj => $offset) { |
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| 121 | if (!isset($this->objects[$obj]) AND ($offset > 0)) { |
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| 122 | // decode objects with positive offset
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| 123 | $this->objects[$obj] = $this->getIndirectObject($obj, $offset, true); |
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| 124 | } |
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| 125 | } |
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| 126 | // release some memory
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| 127 | unset($this->pdfdata); |
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| 128 | $this->pdfdata = ''; |
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| 129 | } |
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| 130 | |||
| 131 | /**
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| 132 | * Set the configuration parameters.
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| 133 | * @param $cfg (array) Array of configuration parameters:
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| 134 | * 'die_for_errors' : if true termitate the program execution in case of error, otherwise thows an exception;
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| 135 | * 'ignore_filter_decoding_errors' : if true ignore filter decoding errors;
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| 136 | * 'ignore_missing_filter_decoders' : if true ignore missing filter decoding errors.
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| 137 | * @public
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| 138 | */
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| 139 | protected function setConfig($cfg) { |
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| 140 | if (isset($cfg['die_for_errors'])) { |
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| 141 | $this->cfg['die_for_errors'] = !!$cfg['die_for_errors']; |
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| 142 | } |
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| 143 | if (isset($cfg['ignore_filter_decoding_errors'])) { |
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| 144 | $this->cfg['ignore_filter_decoding_errors'] = !!$cfg['ignore_filter_decoding_errors']; |
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| 145 | } |
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| 146 | if (isset($cfg['ignore_missing_filter_decoders'])) { |
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| 147 | $this->cfg['ignore_missing_filter_decoders'] = !!$cfg['ignore_missing_filter_decoders']; |
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| 148 | } |
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| 149 | } |
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| 150 | |||
| 151 | /**
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| 152 | * Return an array of parsed PDF document objects.
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| 153 | * @return (array) Array of parsed PDF document objects.
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| 154 | * @public
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| 155 | * @since 1.0.000 (2011-06-26)
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| 156 | */
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| 157 | public function getParsedData() { |
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| 158 | return array($this->xref, $this->objects); |
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| 159 | } |
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| 160 | |||
| 161 | /**
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| 162 | * Get Cross-Reference (xref) table and trailer data from PDF document data.
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| 163 | * @param $offset (int) xref offset (if know).
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| 164 | * @param $xref (array) previous xref array (if any).
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| 165 | * @return Array containing xref and trailer data.
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| 166 | * @protected
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| 167 | * @since 1.0.000 (2011-05-24)
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| 168 | */
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| 169 | protected function getXrefData($offset=0, $xref=array()) { |
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| 170 | if ($offset == 0) { |
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| 171 | // find last startxref
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| 172 | if (preg_match_all('/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i', $this->pdfdata, $matches, PREG_SET_ORDER, $offset) == 0) { |
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| 173 | $this->Error('Unable to find startxref'); |
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| 174 | } |
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| 175 | $matches = array_pop($matches); |
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| 176 | $startxref = $matches[1]; |
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| 177 | } elseif (strpos($this->pdfdata, 'xref', $offset) == $offset) { |
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| 178 | // Already pointing at the xref table
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| 179 | $startxref = $offset; |
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| 180 | } elseif (preg_match('/([0-9]+[\s][0-9]+[\s]obj)/i', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset)) { |
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| 181 | // Cross-Reference Stream object
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| 182 | $startxref = $offset; |
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| 183 | } elseif (preg_match('/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset)) { |
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| 184 | // startxref found
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| 185 | $startxref = $matches[1][0]; |
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| 186 | } else {
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| 187 | $this->Error('Unable to find startxref'); |
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| 188 | } |
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| 189 | // check xref position
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| 190 | if (strpos($this->pdfdata, 'xref', $startxref) == $startxref) { |
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| 191 | // Cross-Reference
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| 192 | $xref = $this->decodeXref($startxref, $xref); |
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| 193 | } else {
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| 194 | // Cross-Reference Stream
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| 195 | $xref = $this->decodeXrefStream($startxref, $xref); |
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| 196 | } |
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| 197 | if (empty($xref)) { |
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| 198 | $this->Error('Unable to find xref'); |
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| 199 | } |
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| 200 | return $xref; |
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| 201 | } |
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| 202 | |||
| 203 | /**
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| 204 | * Decode the Cross-Reference section
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| 205 | * @param $startxref (int) Offset at which the xref section starts (position of the 'xref' keyword).
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| 206 | * @param $xref (array) Previous xref array (if any).
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| 207 | * @return Array containing xref and trailer data.
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| 208 | * @protected
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| 209 | * @since 1.0.000 (2011-06-20)
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| 210 | */
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| 211 | protected function decodeXref($startxref, $xref=array()) { |
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| 212 | c3ebc5b9 | Assos Assos | $startxref += 4; // 4 is the length of the word 'xref' |
| 213 | 85ad3d82 | Assos Assos | // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP)
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| 214 | $offset = $startxref + strspn($this->pdfdata, "\x00\x09\x0a\x0c\x0d\x20", $startxref); |
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| 215 | // initialize object number
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| 216 | $obj_num = 0; |
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| 217 | // search for cross-reference entries or subsection
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| 218 | while (preg_match('/([0-9]+)[\x20]([0-9]+)[\x20]?([nf]?)(\r\n|[\x20]?[\r\n])/', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) { |
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| 219 | if ($matches[0][1] != $offset) { |
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| 220 | // we are on another section
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| 221 | break;
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| 222 | } |
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| 223 | $offset += strlen($matches[0][0]); |
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| 224 | if ($matches[3][0] == 'n') { |
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| 225 | // create unique object index: [object number]_[generation number]
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| 226 | $index = $obj_num.'_'.intval($matches[2][0]); |
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| 227 | // check if object already exist
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| 228 | if (!isset($xref['xref'][$index])) { |
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| 229 | // store object offset position
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| 230 | $xref['xref'][$index] = intval($matches[1][0]); |
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| 231 | } |
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| 232 | ++$obj_num;
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| 233 | } elseif ($matches[3][0] == 'f') { |
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| 234 | ++$obj_num;
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| 235 | } else {
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| 236 | // object number (index)
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| 237 | $obj_num = intval($matches[1][0]); |
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| 238 | } |
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| 239 | } |
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| 240 | // get trailer data
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| 241 | c3ebc5b9 | Assos Assos | if (preg_match('/trailer[\s]*<<(.*)>>/isU', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) { |
| 242 | 85ad3d82 | Assos Assos | $trailer_data = $matches[1][0]; |
| 243 | if (!isset($xref['trailer']) OR empty($xref['trailer'])) { |
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| 244 | // get only the last updated version
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| 245 | $xref['trailer'] = array(); |
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| 246 | // parse trailer_data
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| 247 | if (preg_match('/Size[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { |
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| 248 | $xref['trailer']['size'] = intval($matches[1]); |
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| 249 | } |
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| 250 | if (preg_match('/Root[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 251 | $xref['trailer']['root'] = intval($matches[1]).'_'.intval($matches[2]); |
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| 252 | } |
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| 253 | if (preg_match('/Encrypt[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 254 | $xref['trailer']['encrypt'] = intval($matches[1]).'_'.intval($matches[2]); |
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| 255 | } |
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| 256 | if (preg_match('/Info[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 257 | $xref['trailer']['info'] = intval($matches[1]).'_'.intval($matches[2]); |
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| 258 | } |
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| 259 | if (preg_match('/ID[\s]*[\[][\s]*[<]([^>]*)[>][\s]*[<]([^>]*)[>]/i', $trailer_data, $matches) > 0) { |
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| 260 | $xref['trailer']['id'] = array(); |
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| 261 | $xref['trailer']['id'][0] = $matches[1]; |
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| 262 | $xref['trailer']['id'][1] = $matches[2]; |
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| 263 | } |
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| 264 | } |
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| 265 | if (preg_match('/Prev[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { |
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| 266 | // get previous xref
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| 267 | $xref = $this->getXrefData(intval($matches[1]), $xref); |
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| 268 | } |
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| 269 | } else {
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| 270 | $this->Error('Unable to find trailer'); |
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| 271 | } |
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| 272 | return $xref; |
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| 273 | } |
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| 274 | |||
| 275 | /**
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| 276 | * Decode the Cross-Reference Stream section
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| 277 | * @param $startxref (int) Offset at which the xref section starts.
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| 278 | * @param $xref (array) Previous xref array (if any).
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| 279 | * @return Array containing xref and trailer data.
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| 280 | * @protected
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| 281 | * @since 1.0.003 (2013-03-16)
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| 282 | */
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| 283 | protected function decodeXrefStream($startxref, $xref=array()) { |
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| 284 | // try to read Cross-Reference Stream
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| 285 | $xrefobj = $this->getRawObject($startxref); |
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| 286 | $xrefcrs = $this->getIndirectObject($xrefobj[1], $startxref, true); |
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| 287 | if (!isset($xref['trailer']) OR empty($xref['trailer'])) { |
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| 288 | // get only the last updated version
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| 289 | $xref['trailer'] = array(); |
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| 290 | $filltrailer = true; |
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| 291 | } else {
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| 292 | $filltrailer = false; |
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| 293 | } |
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| 294 | c3ebc5b9 | Assos Assos | if (!isset($xref['xref'])) { |
| 295 | $xref['xref'] = array(); |
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| 296 | } |
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| 297 | 85ad3d82 | Assos Assos | $valid_crs = false; |
| 298 | c3ebc5b9 | Assos Assos | $columns = 0; |
| 299 | 85ad3d82 | Assos Assos | $sarr = $xrefcrs[0][1]; |
| 300 | c3ebc5b9 | Assos Assos | if (!is_array($sarr)) { |
| 301 | $sarr = array(); |
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| 302 | } |
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| 303 | 85ad3d82 | Assos Assos | foreach ($sarr as $k => $v) { |
| 304 | if (($v[0] == '/') AND ($v[1] == 'Type') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == '/') AND ($sarr[($k +1)][1] == 'XRef'))) { |
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| 305 | $valid_crs = true; |
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| 306 | } elseif (($v[0] == '/') AND ($v[1] == 'Index') AND (isset($sarr[($k +1)]))) { |
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| 307 | // first object number in the subsection
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| 308 | $index_first = intval($sarr[($k +1)][1][0][1]); |
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| 309 | // number of entries in the subsection
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| 310 | $index_entries = intval($sarr[($k +1)][1][1][1]); |
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| 311 | } elseif (($v[0] == '/') AND ($v[1] == 'Prev') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == 'numeric'))) { |
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| 312 | // get previous xref offset
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| 313 | $prevxref = intval($sarr[($k +1)][1]); |
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| 314 | } elseif (($v[0] == '/') AND ($v[1] == 'W') AND (isset($sarr[($k +1)]))) { |
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| 315 | // number of bytes (in the decoded stream) of the corresponding field
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| 316 | $wb = array(); |
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| 317 | $wb[0] = intval($sarr[($k +1)][1][0][1]); |
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| 318 | $wb[1] = intval($sarr[($k +1)][1][1][1]); |
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| 319 | $wb[2] = intval($sarr[($k +1)][1][2][1]); |
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| 320 | } elseif (($v[0] == '/') AND ($v[1] == 'DecodeParms') AND (isset($sarr[($k +1)][1]))) { |
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| 321 | $decpar = $sarr[($k +1)][1]; |
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| 322 | foreach ($decpar as $kdc => $vdc) { |
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| 323 | if (($vdc[0] == '/') AND ($vdc[1] == 'Columns') AND (isset($decpar[($kdc +1)]) AND ($decpar[($kdc +1)][0] == 'numeric'))) { |
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| 324 | $columns = intval($decpar[($kdc +1)][1]); |
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| 325 | } elseif (($vdc[0] == '/') AND ($vdc[1] == 'Predictor') AND (isset($decpar[($kdc +1)]) AND ($decpar[($kdc +1)][0] == 'numeric'))) { |
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| 326 | $predictor = intval($decpar[($kdc +1)][1]); |
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| 327 | } |
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| 328 | } |
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| 329 | } elseif ($filltrailer) { |
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| 330 | if (($v[0] == '/') AND ($v[1] == 'Size') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == 'numeric'))) { |
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| 331 | $xref['trailer']['size'] = $sarr[($k +1)][1]; |
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| 332 | c3ebc5b9 | Assos Assos | } elseif (($v[0] == '/') AND ($v[1] == 'Root') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == 'objref'))) { |
| 333 | 85ad3d82 | Assos Assos | $xref['trailer']['root'] = $sarr[($k +1)][1]; |
| 334 | c3ebc5b9 | Assos Assos | } elseif (($v[0] == '/') AND ($v[1] == 'Info') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == 'objref'))) { |
| 335 | 85ad3d82 | Assos Assos | $xref['trailer']['info'] = $sarr[($k +1)][1]; |
| 336 | c3ebc5b9 | Assos Assos | } elseif (($v[0] == '/') AND ($v[1] == 'Encrypt') AND (isset($sarr[($k +1)]) AND ($sarr[($k +1)][0] == 'objref'))) { |
| 337 | $xref['trailer']['encrypt'] = $sarr[($k +1)][1]; |
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| 338 | 85ad3d82 | Assos Assos | } elseif (($v[0] == '/') AND ($v[1] == 'ID') AND (isset($sarr[($k +1)]))) { |
| 339 | $xref['trailer']['id'] = array(); |
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| 340 | $xref['trailer']['id'][0] = $sarr[($k +1)][1][0][1]; |
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| 341 | $xref['trailer']['id'][1] = $sarr[($k +1)][1][1][1]; |
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| 342 | } |
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| 343 | } |
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| 344 | } |
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| 345 | // decode data
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| 346 | if ($valid_crs AND isset($xrefcrs[1][3][0])) { |
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| 347 | // number of bytes in a row
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| 348 | $rowlen = ($columns + 1); |
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| 349 | // convert the stream into an array of integers
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| 350 | $sdata = unpack('C*', $xrefcrs[1][3][0]); |
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| 351 | // split the rows
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| 352 | $sdata = array_chunk($sdata, $rowlen); |
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| 353 | // initialize decoded array
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| 354 | $ddata = array(); |
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| 355 | // initialize first row with zeros
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| 356 | $prev_row = array_fill (0, $rowlen, 0); |
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| 357 | // for each row apply PNG unpredictor
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| 358 | foreach ($sdata as $k => $row) { |
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| 359 | // initialize new row
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| 360 | $ddata[$k] = array(); |
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| 361 | // get PNG predictor value
|
||
| 362 | $predictor = (10 + $row[0]); |
||
| 363 | // for each byte on the row
|
||
| 364 | for ($i=1; $i<=$columns; ++$i) { |
||
| 365 | // new index
|
||
| 366 | $j = ($i - 1); |
||
| 367 | $row_up = $prev_row[$j]; |
||
| 368 | if ($i == 1) { |
||
| 369 | $row_left = 0; |
||
| 370 | $row_upleft = 0; |
||
| 371 | } else {
|
||
| 372 | $row_left = $row[($i - 1)]; |
||
| 373 | $row_upleft = $prev_row[($j - 1)]; |
||
| 374 | } |
||
| 375 | switch ($predictor) { |
||
| 376 | case 10: { // PNG prediction (on encoding, PNG None on all rows) |
||
| 377 | $ddata[$k][$j] = $row[$i]; |
||
| 378 | break;
|
||
| 379 | } |
||
| 380 | case 11: { // PNG prediction (on encoding, PNG Sub on all rows) |
||
| 381 | $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); |
||
| 382 | break;
|
||
| 383 | } |
||
| 384 | case 12: { // PNG prediction (on encoding, PNG Up on all rows) |
||
| 385 | $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); |
||
| 386 | break;
|
||
| 387 | } |
||
| 388 | case 13: { // PNG prediction (on encoding, PNG Average on all rows) |
||
| 389 | $ddata[$k][$j] = (($row[$i] + (($row_left + $row_up) / 2)) & 0xff); |
||
| 390 | break;
|
||
| 391 | } |
||
| 392 | case 14: { // PNG prediction (on encoding, PNG Paeth on all rows) |
||
| 393 | // initial estimate
|
||
| 394 | $p = ($row_left + $row_up - $row_upleft); |
||
| 395 | // distances
|
||
| 396 | $pa = abs($p - $row_left); |
||
| 397 | $pb = abs($p - $row_up); |
||
| 398 | $pc = abs($p - $row_upleft); |
||
| 399 | $pmin = min($pa, $pb, $pc); |
||
| 400 | c3ebc5b9 | Assos Assos | // return minimum distance
|
| 401 | 85ad3d82 | Assos Assos | switch ($pmin) { |
| 402 | case $pa: { |
||
| 403 | $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); |
||
| 404 | break;
|
||
| 405 | } |
||
| 406 | case $pb: { |
||
| 407 | $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); |
||
| 408 | break;
|
||
| 409 | } |
||
| 410 | case $pc: { |
||
| 411 | $ddata[$k][$j] = (($row[$i] + $row_upleft) & 0xff); |
||
| 412 | break;
|
||
| 413 | } |
||
| 414 | } |
||
| 415 | break;
|
||
| 416 | } |
||
| 417 | default: { // PNG prediction (on encoding, PNG optimum) |
||
| 418 | $this->Error('Unknown PNG predictor'); |
||
| 419 | break;
|
||
| 420 | } |
||
| 421 | } |
||
| 422 | } |
||
| 423 | $prev_row = $ddata[$k]; |
||
| 424 | } // end for each row
|
||
| 425 | // complete decoding
|
||
| 426 | $sdata = array(); |
||
| 427 | // for every row
|
||
| 428 | foreach ($ddata as $k => $row) { |
||
| 429 | // initialize new row
|
||
| 430 | $sdata[$k] = array(0, 0, 0); |
||
| 431 | if ($wb[0] == 0) { |
||
| 432 | // default type field
|
||
| 433 | $sdata[$k][0] = 1; |
||
| 434 | } |
||
| 435 | c3ebc5b9 | Assos Assos | $i = 0; // count bytes in the row |
| 436 | 85ad3d82 | Assos Assos | // for every column
|
| 437 | for ($c = 0; $c < 3; ++$c) { |
||
| 438 | // for every byte on the column
|
||
| 439 | for ($b = 0; $b < $wb[$c]; ++$b) { |
||
| 440 | c3ebc5b9 | Assos Assos | if (isset($row[$i])) { |
| 441 | $sdata[$k][$c] += ($row[$i] << (($wb[$c] - 1 - $b) * 8)); |
||
| 442 | } |
||
| 443 | 85ad3d82 | Assos Assos | ++$i;
|
| 444 | } |
||
| 445 | } |
||
| 446 | } |
||
| 447 | $ddata = array(); |
||
| 448 | // fill xref
|
||
| 449 | if (isset($index_first)) { |
||
| 450 | $obj_num = $index_first; |
||
| 451 | } else {
|
||
| 452 | $obj_num = 0; |
||
| 453 | } |
||
| 454 | foreach ($sdata as $k => $row) { |
||
| 455 | switch ($row[0]) { |
||
| 456 | case 0: { // (f) linked list of free objects |
||
| 457 | break;
|
||
| 458 | } |
||
| 459 | case 1: { // (n) objects that are in use but are not compressed |
||
| 460 | // create unique object index: [object number]_[generation number]
|
||
| 461 | $index = $obj_num.'_'.$row[2]; |
||
| 462 | // check if object already exist
|
||
| 463 | if (!isset($xref['xref'][$index])) { |
||
| 464 | // store object offset position
|
||
| 465 | $xref['xref'][$index] = $row[1]; |
||
| 466 | } |
||
| 467 | break;
|
||
| 468 | } |
||
| 469 | case 2: { // compressed objects |
||
| 470 | // $row[1] = object number of the object stream in which this object is stored
|
||
| 471 | // $row[2] = index of this object within the object stream
|
||
| 472 | $index = $row[1].'_0_'.$row[2]; |
||
| 473 | $xref['xref'][$index] = -1; |
||
| 474 | break;
|
||
| 475 | } |
||
| 476 | default: { // null objects |
||
| 477 | break;
|
||
| 478 | } |
||
| 479 | } |
||
| 480 | c3ebc5b9 | Assos Assos | ++$obj_num;
|
| 481 | 85ad3d82 | Assos Assos | } |
| 482 | } // end decoding data
|
||
| 483 | if (isset($prevxref)) { |
||
| 484 | // get previous xref
|
||
| 485 | $xref = $this->getXrefData($prevxref, $xref); |
||
| 486 | } |
||
| 487 | return $xref; |
||
| 488 | } |
||
| 489 | |||
| 490 | /**
|
||
| 491 | * Get object type, raw value and offset to next object
|
||
| 492 | * @param $offset (int) Object offset.
|
||
| 493 | * @return array containing object type, raw value and offset to next object
|
||
| 494 | * @protected
|
||
| 495 | * @since 1.0.000 (2011-06-20)
|
||
| 496 | */
|
||
| 497 | protected function getRawObject($offset=0) { |
||
| 498 | $objtype = ''; // object type to be returned |
||
| 499 | $objval = ''; // object value to be returned |
||
| 500 | // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP)
|
||
| 501 | $offset += strspn($this->pdfdata, "\x00\x09\x0a\x0c\x0d\x20", $offset); |
||
| 502 | // get first char
|
||
| 503 | $char = $this->pdfdata[$offset]; |
||
| 504 | // get object type
|
||
| 505 | switch ($char) { |
||
| 506 | case '%': { // \x25 PERCENT SIGN |
||
| 507 | // skip comment and search for next token
|
||
| 508 | $next = strcspn($this->pdfdata, "\r\n", $offset); |
||
| 509 | if ($next > 0) { |
||
| 510 | $offset += $next; |
||
| 511 | c3ebc5b9 | Assos Assos | return $this->getRawObject($offset); |
| 512 | 85ad3d82 | Assos Assos | } |
| 513 | break;
|
||
| 514 | } |
||
| 515 | case '/': { // \x2F SOLIDUS |
||
| 516 | // name object
|
||
| 517 | $objtype = $char; |
||
| 518 | ++$offset;
|
||
| 519 | if (preg_match('/^([^\x00\x09\x0a\x0c\x0d\x20\s\x28\x29\x3c\x3e\x5b\x5d\x7b\x7d\x2f\x25]+)/', substr($this->pdfdata, $offset, 256), $matches) == 1) { |
||
| 520 | $objval = $matches[1]; // unescaped value |
||
| 521 | $offset += strlen($objval); |
||
| 522 | } |
||
| 523 | break;
|
||
| 524 | } |
||
| 525 | case '(': // \x28 LEFT PARENTHESIS |
||
| 526 | case ')': { // \x29 RIGHT PARENTHESIS |
||
| 527 | // literal string object
|
||
| 528 | $objtype = $char; |
||
| 529 | ++$offset;
|
||
| 530 | $strpos = $offset; |
||
| 531 | if ($char == '(') { |
||
| 532 | $open_bracket = 1; |
||
| 533 | while ($open_bracket > 0) { |
||
| 534 | if (!isset($this->pdfdata{$strpos})) { |
||
| 535 | break;
|
||
| 536 | } |
||
| 537 | $ch = $this->pdfdata{$strpos}; |
||
| 538 | switch ($ch) { |
||
| 539 | case '\\': { // REVERSE SOLIDUS (5Ch) (Backslash) |
||
| 540 | // skip next character
|
||
| 541 | ++$strpos;
|
||
| 542 | break;
|
||
| 543 | } |
||
| 544 | case '(': { // LEFT PARENHESIS (28h) |
||
| 545 | ++$open_bracket;
|
||
| 546 | break;
|
||
| 547 | } |
||
| 548 | case ')': { // RIGHT PARENTHESIS (29h) |
||
| 549 | --$open_bracket;
|
||
| 550 | break;
|
||
| 551 | } |
||
| 552 | } |
||
| 553 | ++$strpos;
|
||
| 554 | } |
||
| 555 | $objval = substr($this->pdfdata, $offset, ($strpos - $offset - 1)); |
||
| 556 | $offset = $strpos; |
||
| 557 | } |
||
| 558 | break;
|
||
| 559 | } |
||
| 560 | case '[': // \x5B LEFT SQUARE BRACKET |
||
| 561 | case ']': { // \x5D RIGHT SQUARE BRACKET |
||
| 562 | // array object
|
||
| 563 | $objtype = $char; |
||
| 564 | ++$offset;
|
||
| 565 | if ($char == '[') { |
||
| 566 | // get array content
|
||
| 567 | $objval = array(); |
||
| 568 | do {
|
||
| 569 | // get element
|
||
| 570 | $element = $this->getRawObject($offset); |
||
| 571 | $offset = $element[2]; |
||
| 572 | $objval[] = $element; |
||
| 573 | } while ($element[0] != ']'); |
||
| 574 | // remove closing delimiter
|
||
| 575 | array_pop($objval); |
||
| 576 | } |
||
| 577 | break;
|
||
| 578 | } |
||
| 579 | case '<': // \x3C LESS-THAN SIGN |
||
| 580 | case '>': { // \x3E GREATER-THAN SIGN |
||
| 581 | if (isset($this->pdfdata{($offset + 1)}) AND ($this->pdfdata{($offset + 1)} == $char)) { |
||
| 582 | // dictionary object
|
||
| 583 | $objtype = $char.$char; |
||
| 584 | $offset += 2; |
||
| 585 | if ($char == '<') { |
||
| 586 | // get array content
|
||
| 587 | $objval = array(); |
||
| 588 | do {
|
||
| 589 | // get element
|
||
| 590 | $element = $this->getRawObject($offset); |
||
| 591 | $offset = $element[2]; |
||
| 592 | $objval[] = $element; |
||
| 593 | } while ($element[0] != '>>'); |
||
| 594 | // remove closing delimiter
|
||
| 595 | array_pop($objval); |
||
| 596 | } |
||
| 597 | } else {
|
||
| 598 | // hexadecimal string object
|
||
| 599 | $objtype = $char; |
||
| 600 | ++$offset;
|
||
| 601 | if (($char == '<') AND (preg_match('/^([0-9A-Fa-f\x09\x0a\x0c\x0d\x20]+)>/iU', substr($this->pdfdata, $offset), $matches) == 1)) { |
||
| 602 | // remove white space characters
|
||
| 603 | $objval = strtr($matches[1], "\x09\x0a\x0c\x0d\x20", ''); |
||
| 604 | $offset += strlen($matches[0]); |
||
| 605 | c3ebc5b9 | Assos Assos | } elseif (($endpos = strpos($this->pdfdata, '>', $offset)) !== FALSE) { |
| 606 | $offset = $endpos + 1; |
||
| 607 | } |
||
| 608 | 85ad3d82 | Assos Assos | } |
| 609 | break;
|
||
| 610 | } |
||
| 611 | default: {
|
||
| 612 | if (substr($this->pdfdata, $offset, 6) == 'endobj') { |
||
| 613 | // indirect object
|
||
| 614 | $objtype = 'endobj'; |
||
| 615 | $offset += 6; |
||
| 616 | } elseif (substr($this->pdfdata, $offset, 4) == 'null') { |
||
| 617 | // null object
|
||
| 618 | $objtype = 'null'; |
||
| 619 | $offset += 4; |
||
| 620 | $objval = 'null'; |
||
| 621 | } elseif (substr($this->pdfdata, $offset, 4) == 'true') { |
||
| 622 | // boolean true object
|
||
| 623 | $objtype = 'boolean'; |
||
| 624 | $offset += 4; |
||
| 625 | $objval = 'true'; |
||
| 626 | } elseif (substr($this->pdfdata, $offset, 5) == 'false') { |
||
| 627 | // boolean false object
|
||
| 628 | $objtype = 'boolean'; |
||
| 629 | $offset += 5; |
||
| 630 | $objval = 'false'; |
||
| 631 | } elseif (substr($this->pdfdata, $offset, 6) == 'stream') { |
||
| 632 | // start stream object
|
||
| 633 | $objtype = 'stream'; |
||
| 634 | $offset += 6; |
||
| 635 | if (preg_match('/^([\r]?[\n])/isU', substr($this->pdfdata, $offset), $matches) == 1) { |
||
| 636 | $offset += strlen($matches[0]); |
||
| 637 | c3ebc5b9 | Assos Assos | if (preg_match('/(endstream)[\x09\x0a\x0c\x0d\x20]/isU', substr($this->pdfdata, $offset), $matches, PREG_OFFSET_CAPTURE) == 1) { |
| 638 | 85ad3d82 | Assos Assos | $objval = substr($this->pdfdata, $offset, $matches[0][1]); |
| 639 | c3ebc5b9 | Assos Assos | $offset += $matches[1][1]; |
| 640 | 85ad3d82 | Assos Assos | } |
| 641 | } |
||
| 642 | } elseif (substr($this->pdfdata, $offset, 9) == 'endstream') { |
||
| 643 | // end stream object
|
||
| 644 | $objtype = 'endstream'; |
||
| 645 | $offset += 9; |
||
| 646 | } elseif (preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+R/iU', substr($this->pdfdata, $offset, 33), $matches) == 1) { |
||
| 647 | // indirect object reference
|
||
| 648 | c3ebc5b9 | Assos Assos | $objtype = 'objref'; |
| 649 | 85ad3d82 | Assos Assos | $offset += strlen($matches[0]); |
| 650 | $objval = intval($matches[1]).'_'.intval($matches[2]); |
||
| 651 | } elseif (preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+obj/iU', substr($this->pdfdata, $offset, 33), $matches) == 1) { |
||
| 652 | // object start
|
||
| 653 | c3ebc5b9 | Assos Assos | $objtype = 'obj'; |
| 654 | 85ad3d82 | Assos Assos | $objval = intval($matches[1]).'_'.intval($matches[2]); |
| 655 | $offset += strlen ($matches[0]); |
||
| 656 | } elseif (($numlen = strspn($this->pdfdata, '+-.0123456789', $offset)) > 0) { |
||
| 657 | // numeric object
|
||
| 658 | $objtype = 'numeric'; |
||
| 659 | $objval = substr($this->pdfdata, $offset, $numlen); |
||
| 660 | $offset += $numlen; |
||
| 661 | } |
||
| 662 | break;
|
||
| 663 | } |
||
| 664 | } |
||
| 665 | return array($objtype, $objval, $offset); |
||
| 666 | } |
||
| 667 | |||
| 668 | /**
|
||
| 669 | * Get content of indirect object.
|
||
| 670 | * @param $obj_ref (string) Object number and generation number separated by underscore character.
|
||
| 671 | * @param $offset (int) Object offset.
|
||
| 672 | * @param $decoding (boolean) If true decode streams.
|
||
| 673 | * @return array containing object data.
|
||
| 674 | * @protected
|
||
| 675 | * @since 1.0.000 (2011-05-24)
|
||
| 676 | */
|
||
| 677 | protected function getIndirectObject($obj_ref, $offset=0, $decoding=true) { |
||
| 678 | $obj = explode('_', $obj_ref); |
||
| 679 | if (($obj === false) OR (count($obj) != 2)) { |
||
| 680 | $this->Error('Invalid object reference: '.$obj); |
||
| 681 | return;
|
||
| 682 | } |
||
| 683 | $objref = $obj[0].' '.$obj[1].' obj'; |
||
| 684 | c3ebc5b9 | Assos Assos | // ignore leading zeros
|
| 685 | $offset += strspn($this->pdfdata, '0', $offset); |
||
| 686 | 85ad3d82 | Assos Assos | if (strpos($this->pdfdata, $objref, $offset) != $offset) { |
| 687 | // an indirect reference to an undefined object shall be considered a reference to the null object
|
||
| 688 | return array('null', 'null', $offset); |
||
| 689 | } |
||
| 690 | // starting position of object content
|
||
| 691 | $offset += strlen($objref); |
||
| 692 | // get array of object content
|
||
| 693 | $objdata = array(); |
||
| 694 | $i = 0; // object main index |
||
| 695 | do {
|
||
| 696 | c3ebc5b9 | Assos Assos | $oldoffset = $offset; |
| 697 | // get element
|
||
| 698 | 85ad3d82 | Assos Assos | $element = $this->getRawObject($offset); |
| 699 | $offset = $element[2]; |
||
| 700 | // decode stream using stream's dictionary information
|
||
| 701 | if ($decoding AND ($element[0] == 'stream') AND (isset($objdata[($i - 1)][0])) AND ($objdata[($i - 1)][0] == '<<')) { |
||
| 702 | $element[3] = $this->decodeStream($objdata[($i - 1)][1], $element[1]); |
||
| 703 | } |
||
| 704 | $objdata[$i] = $element; |
||
| 705 | ++$i;
|
||
| 706 | c3ebc5b9 | Assos Assos | } while (($element[0] != 'endobj') AND ($offset != $oldoffset)); |
| 707 | 85ad3d82 | Assos Assos | // remove closing delimiter
|
| 708 | array_pop($objdata); |
||
| 709 | // return raw object content
|
||
| 710 | return $objdata; |
||
| 711 | } |
||
| 712 | |||
| 713 | /**
|
||
| 714 | * Get the content of object, resolving indect object reference if necessary.
|
||
| 715 | * @param $obj (string) Object value.
|
||
| 716 | * @return array containing object data.
|
||
| 717 | * @protected
|
||
| 718 | * @since 1.0.000 (2011-06-26)
|
||
| 719 | */
|
||
| 720 | protected function getObjectVal($obj) { |
||
| 721 | if ($obj[0] == 'objref') { |
||
| 722 | // reference to indirect object
|
||
| 723 | if (isset($this->objects[$obj[1]])) { |
||
| 724 | // this object has been already parsed
|
||
| 725 | return $this->objects[$obj[1]]; |
||
| 726 | } elseif (isset($this->xref[$obj[1]])) { |
||
| 727 | // parse new object
|
||
| 728 | $this->objects[$obj[1]] = $this->getIndirectObject($obj[1], $this->xref[$obj[1]], false); |
||
| 729 | return $this->objects[$obj[1]]; |
||
| 730 | } |
||
| 731 | } |
||
| 732 | return $obj; |
||
| 733 | } |
||
| 734 | |||
| 735 | /**
|
||
| 736 | * Decode the specified stream.
|
||
| 737 | * @param $sdic (array) Stream's dictionary array.
|
||
| 738 | * @param $stream (string) Stream to decode.
|
||
| 739 | * @return array containing decoded stream data and remaining filters.
|
||
| 740 | * @protected
|
||
| 741 | * @since 1.0.000 (2011-06-22)
|
||
| 742 | */
|
||
| 743 | protected function decodeStream($sdic, $stream) { |
||
| 744 | c3ebc5b9 | Assos Assos | // get stream length and filters
|
| 745 | 85ad3d82 | Assos Assos | $slength = strlen($stream); |
| 746 | if ($slength <= 0) { |
||
| 747 | return array('', array()); |
||
| 748 | } |
||
| 749 | $filters = array(); |
||
| 750 | foreach ($sdic as $k => $v) { |
||
| 751 | if ($v[0] == '/') { |
||
| 752 | if (($v[1] == 'Length') AND (isset($sdic[($k + 1)])) AND ($sdic[($k + 1)][0] == 'numeric')) { |
||
| 753 | c3ebc5b9 | Assos Assos | // get declared stream length
|
| 754 | 85ad3d82 | Assos Assos | $declength = intval($sdic[($k + 1)][1]); |
| 755 | if ($declength < $slength) { |
||
| 756 | $stream = substr($stream, 0, $declength); |
||
| 757 | $slength = $declength; |
||
| 758 | } |
||
| 759 | } elseif (($v[1] == 'Filter') AND (isset($sdic[($k + 1)]))) { |
||
| 760 | // resolve indirect object
|
||
| 761 | $objval = $this->getObjectVal($sdic[($k + 1)]); |
||
| 762 | if ($objval[0] == '/') { |
||
| 763 | // single filter
|
||
| 764 | $filters[] = $objval[1]; |
||
| 765 | } elseif ($objval[0] == '[') { |
||
| 766 | // array of filters
|
||
| 767 | foreach ($objval[1] as $flt) { |
||
| 768 | if ($flt[0] == '/') { |
||
| 769 | $filters[] = $flt[1]; |
||
| 770 | } |
||
| 771 | } |
||
| 772 | } |
||
| 773 | } |
||
| 774 | } |
||
| 775 | } |
||
| 776 | // decode the stream
|
||
| 777 | $remaining_filters = array(); |
||
| 778 | foreach ($filters as $filter) { |
||
| 779 | if (in_array($filter, TCPDF_FILTERS::getAvailableFilters())) { |
||
| 780 | try {
|
||
| 781 | $stream = TCPDF_FILTERS::decodeFilter($filter, $stream); |
||
| 782 | } catch (Exception $e) { |
||
| 783 | $emsg = $e->getMessage(); |
||
| 784 | if ((($emsg[0] == '~') AND !$this->cfg['ignore_missing_filter_decoders']) |
||
| 785 | OR (($emsg[0] != '~') AND !$this->cfg['ignore_filter_decoding_errors'])) { |
||
| 786 | $this->Error($e->getMessage()); |
||
| 787 | } |
||
| 788 | } |
||
| 789 | } else {
|
||
| 790 | // add missing filter to array
|
||
| 791 | $remaining_filters[] = $filter; |
||
| 792 | } |
||
| 793 | } |
||
| 794 | return array($stream, $remaining_filters); |
||
| 795 | } |
||
| 796 | |||
| 797 | /**
|
||
| 798 | * Throw an exception or print an error message and die if the K_TCPDF_PARSER_THROW_EXCEPTION_ERROR constant is set to true.
|
||
| 799 | * @param $msg (string) The error message
|
||
| 800 | * @public
|
||
| 801 | * @since 1.0.000 (2011-05-23)
|
||
| 802 | */
|
||
| 803 | public function Error($msg) { |
||
| 804 | if ($this->cfg['die_for_errors']) { |
||
| 805 | die('<strong>TCPDF_PARSER ERROR: </strong>'.$msg); |
||
| 806 | } else {
|
||
| 807 | throw new Exception('TCPDF_PARSER ERROR: '.$msg); |
||
| 808 | } |
||
| 809 | } |
||
| 810 | |||
| 811 | } // END OF TCPDF_PARSER CLASS
|
||
| 812 | |||
| 813 | //============================================================+
|
||
| 814 | // END OF FILE
|
||
| 815 | //============================================================+ |